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Senior React Developer

2 weeks ago

Prague, Czech Republic RockawayX Infra s.r.o. Full time 120,000 - 180,000 per year

We are looking for a Senior React (TypeScript) Developer to join our small, agile team and build the customer/admin portal for a greenfield, programmable, low-latency RPC service—covering billing, observability, configuration, and access management for high-demand Web3 apps.

In this role, you will design application portal and develop user-facing features in React, working on areas such as billing, monitoring, service configuration, and user management. You will collaborate closely with backend engineers to turn complex infrastructure capabilities into an intuitive, reliable interface, and as an early team member you'll have a strong influence on product design, technical decisions, and development standards, delivering production-ready code with proper testing and CI/CD practices.

What you'll do:

Design, implement, and maintain performant, secure, and reliable systems in React

Write clean, well-documented, and maintainable code with comprehensive test coverage.

Collaborate with project manager, other developers, tester and engineers to deliver end-to-end blockchain solution.

Perform code reviews, identify risks, and implement best practices for security and performance.

Stay current with the latest blockchain frameworks, tools, and security standards.

Designing, coding, and implementing Web3 applications that meet the functional and nonfunctional requirements of the projects

Testing the app stability and functionality by using unit testing tools

Requirements

Must-have

Strong proficiency in React and TypeScript.

Solid understanding of JavaScript (ES6+) and modern frontend development practices.

Experience with state management (e.g., Redux).

Proficiency in building and consuming RESTful APIs (GraphQL is a plus).

Familiarity with component-driven development and UI libraries/frameworks

Good grasp of responsive design and cross-browser compatibility.

Strong knowledge of software development practices: Git, branching strategies, CI/CD pipelines, code reviews, Agile delivery.

Experience writing unit and integration tests (e.g., Jest, React Testing Library).

Ability to deliver clean, maintainable, and well-documented code.

Nice-to-have

Experience with  or other SSR frameworks.

Familiarity with authentication/authorization flows (e.g., OAuth2, Keycloak, Web3 auth).

Understanding of performance optimization techniques for frontend apps.

Exposure to Web3 integrations (wallet connection, smart contract interaction, dApps).

Experience with data visualization libraries (e.g., , Recharts, ).

Benefits

Competitive compensation package

Cooperation as full-time employment (HPP) or contract (freelance/ICO)

Office in Dejvice, Prague with hybrid work (3–4 days/week onsite)

Flexible working hours

Direct collaboration with the CEO of RockawayX Infra

Opportunity to shape a cutting-edge infrastructure product from the ground up